Separating parts of a 3D object for isolated functions in Unity
Unity imports work just like the Blender inspector shows. If you have a Blender scene named Shapes and it has a cube and sphere, when you take it into Unity you will see a empty named Shapes that has children called cube and sphere. The whole scene can be moved by selecting the Shapes empty or you can do it individually with the children. You can do whatever you want (components, materials, textures) on an individual child or scene wide level. If an object is parented, lets say cone is parented to cube, it will show up as a child in Unity.